一个日志工具，Logger is the tool for logging. It is an singleton, and only one instance in one application.

Syntax Analyzer: this tool with nice GUI can analyze the simple C++ code for syntax errors! It will also tell you the line of syntax error! You could type the code or open a text file with code, and it is also possible to save a file with code.

此代码是需要用throb c作为开发工具为基础的俄罗斯方块游戏。因为调用了里面的图形函数头文件graphics.h-This code is needed throb c as a development tool based Tetris game. Because the graphics function calls inside the header file graphics.h

DES加密聊天工具，共包含3个文件：chat.cpp、des.h、makefile。 编译：命令行模式下，切换到代码所在目录，输入make后回车即可。 运行：命令行模式下输入 ./chat，然后选择程序执行角色（客户端或服务器）。如选择服务器，则程序自动打开端口开始监听；如选择客户端，则需要输入服务器地址。最后输入命令quit退出程序。-DES encryption chat tool contains three files: chat.cpp, des.h, makefile. Co